https://www.siliconvalley.com/2021/04/02/covid-indoor-concerts-receptions-conferences-oh-my-heres-whats-allowed-under-californias-new-gathering-rules/ > California officials Friday announced updated rules for gatherings, receptions, conferences, and indoor live events and performances starting April 15 that will allow more people to congregate, especially when vaccinated. > The rules are based on California’s four color-coded restriction levels that indicate county COVID-19 infection rates — purple for widespread, red for substantial, orange for moderate and yellow for minimal — which are set to change as more people get vaccinated.